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Effect of fluid drag on low reynolds number discharge of solids from a circular orifice
Author(s) -
Altenkirch R. A.,
Eichhorn Roger
Publication year - 1981
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690270409
Subject(s) - body orifice , mechanics , drag , reynolds number , dimensionless quantity , orifice plate , inertia , conical surface , drag coefficient , materials science , chemistry , classical mechanics , physics , mechanical engineering , engineering , composite material , turbulence
A dimensionless solids flowrate for discharge from an orifice in the bottom of a containing vessel is shown to be a function of a parameter that measures the importance of fluid drag to particle inertia. The analysis assumes a linear relation between presure gradient and slip velocity and compares favorably to experiment within its supposed region of applicability for three experimental situations: the self‐induced, air‐impeded discharge of fine particles from a conical hopper; the discharge of particles from a sealed egg‐timer‐like vessel; and the air‐assisted discharge of particles through an orifice.